<!DOCTYPE html>
<html class="test-wait">
<script>
document.addEventListener("DOMContentLoaded", () => {
  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      document.querySelector('div').ariaHidden = true;
      requestAnimationFrame(() => {
        requestAnimationFrame(() => {
          document.documentElement.className = '';
        });
      });
    });
  });
});
</script>
<main>
  <div role="complementary">
    <fieldset aria-owns="owned"></fieldset>
  </div>
</main>
<footer id="owned">
  <mark>
    owned
  </mark>
</footer>
</html>
